Basic Network Analysis Vocabulary

This is a collection of nodes and the edges between them.
a graphic representation of a network and its components. Similar terms include: sociogram, visualization
The thing or entity (shown as circles) that is connected through relationships. This could be individual people, groups of people, institutions (like churches, organizations, schools). One way of thinking about this is that nodes are nouns and edges are verbs - nodes are things that are connected through edges. Similar terms include: actor, vertex
The relationships between nodes you are considering (shown as lines). Relationships can take on many forms: nodes could be connected through somewhat intangible relationships, such as friendship or not liking one another. Edges can be based on interactions, such as talking to one another or being in conflict. They could also be defined by sharing resources, such as money or information. Similar terms include: line, tie, arc
Characteristics of the nodes or edges. A node could be designated by gender, for instance or the amount of wealth they possess. They could also be characteristics you find from the network itself - such as how many ties an node has (degree centrality).
This is a way of ranking the importance of individuals within a network. There are many different ways to measure importance, such as degree centrality, betweenness centrality, and eigenvector centrality.
A community in a network is a way of thinking about grouping, often by finding densely connected sets of nodes. A community within a network that is tightly connected to one another but not to an outside group might be seen as a faction, such as rival political groups. In this case, nodes with high betweenness centrality in a network with multiple factions might be some of the only points of contact between rival groups - a potentially powerful but also difficult position to be in.